PDOS: Basic construction with an additional outer stainless steel shield which covers the spring mechanism and vertical channel guides.
PDOH: Basic construction with the addition of a base mounted heating element, thermally protected fan motor, perforated dispenser head for heat circulation, side mounted thermostat, flange mounted pilot light and on-off switch. A 6′ 16-3 cord set, NEMA 5-15P shall be provided.
Self-Leveling: The spring mechanism is easy to adjust. A combination of extension springs will be provided for field adjusting to the required dispensing height.
